63 research outputs found
Finite element analysis of cementless femoral stems based on mid- and long-term radiological evaluation
Comparison of stress shielding ~5 and ~10 years postoperatively (Fig. 5). (XLSX 12 kb
Epitaxial growth of FeSeTe thin films on CaF substrates with high critical current density
In-situ epitaxial growth of FeSeTe thin films is demonstrated
on a non-oxide substrate CaF. Structural analysis reveals that compressive
stress is moderately added to 36-nm thick FeSeTe, which pushes
up the critical temperature above 15 K, showing higher values than that of bulk
crystals. Critical current density at = 4.5 K reaches 5.9 x 10
Acm at = 10 T, and 4.2 x 10 Acm at = 14 T.
These results indicate that fluoride substrates have high potential for the
growth of iron-based superconductors in comparison with popular oxide
substrates.Comment: 9 pages, 3 figures, to be published in Applied Physics Express 4,
053101 (2011
Binary Formation with Different Metallicities: Dependence on Initial Conditions
The fragmentation process in collapsing clouds with various metallicities is
studied using three-dimensional nested-grid hydrodynamics. Initial clouds are
specified by three parameters: cloud metallicity, initial rotation energy and
initial cloud shape. For different combinations of these parameters, we
calculate 480 models in total and study cloud evolution, fragmentation
conditions, orbital separation and binary frequency. For the cloud to fragment
during collapse, the initial angular momentum must be higher than a threshold
value, which decreases with decreasing metallicity. Although the exact
fragmentation conditions depend also on the initial cloud shape, this
dependence is only modest. Our results indicate a higher binary frequency in
lower-metallicity gas. In particular, with the same median rotation parameter
as in the solar neighbourhood, a majority of stars are born as members of
binary/multiple systems for < 10^-4 Z_sun. With initial mass < 0.1 M_sun, if
fragments are ejected in embryo from the host clouds by multi-body interaction,
they evolve to substellar-mass objects. This provides a formation channel for
low-mass stars in zero- or low-metallicity environments.Comment: Accepted for publication in MNRAS. High resolution figures are
available at
http://www2-tap.scphys.kyoto-u.ac.jp/~machidam/astro-ph/metallicity.pd
Osteoarthritis of the hip joint in elderly patients is most commonly atrophic, with low parameters of acetabular dysplasia and possible involvement of osteoporosis
Activity-Guided Fractionation of Green Tea Extract with Antiproliferative Activity against Human Stomach Cancer Cells
Epidemiological studies have suggested that the consumption of green tea provides protection against stomach cancer. Fractionation of green tea extract, guided by antiproliferative activity against human stomach cancer (MK-1) cells, has resulted in the isolation of six active flavan-3-ols, epicatechin (EC), epigallocatechin (EGC), epigallocatechin gallate (EGCg), gallocatechin (GC), epicatechin gallate (ECg), gallocatechin gallate (GCg), together with inactive glycosides of kaempferol and quercetin. Among the six active flavan-3-ols, EGCg and GCg showed the highest activity, EGC, GC, ECg followed next, and the activity of EC was lowest. These data suggest that the presence of the three adjacent hydroxyl groups (pyrogallol or galloyl group) in the molecule would be a key factor for enhancing the activity. Since reactive oxygen species play an important role in cell death induction, radical scavenging activity was evaluated using the DPPH (1,1-diphenyl-2-picrylhydrazyl) radical. The order of scavenging activity was ECg?EGCg?EGC?GC?EC. The compounds having a galloyl moiety showed more potent activity. The contribution of the pyrogallol moiety in the B-ring to the scavenging activity seemed to be less than that of the galloyl moiety
Finite element analysis of cementless femoral stems based on mid- and long-term radiological evaluation
- …